Accuracy, precision and efficiency The blood glucose test strips for use with the FreeStyle , FreeStyle Mini and FreeStyle Freedom systems stand for easy blood application and quick blood collection. Thanks to the Zipwik design, blood application is much easier and blood collection is quicker because the surface tension of the blood drop is broken. The blood is also absorbed very quickly by the test strip (approx. 4 seconds) and a small amount of blood (0.3 L) is sufficient for the measurement. FreeStyle test strips in the ZipWik design offer a drip function within 60 seconds, which means hardly any unnecessary test strip consumption.